linux-kernel - [PATCH net-next 03/10] net: hns3: Add a check for client instance init state

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Message-ID: <20180515182014.42196-4-salil.mehta@huawei.com>
Date:   Tue, 15 May 2018 19:20:07 +0100
From:   Salil Mehta <salil.mehta@...wei.com>
To:     <davem@...emloft.net>
CC:     <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <lipeng321@...wei.com>, <mehta.salil@...src.net>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, Fuyun Liang <liangfuyun1@...wei.com>
Subject: [PATCH net-next 03/10] net: hns3: Add a check for client instance init state

From: Fuyun Liang <liangfuyun1@...wei.com>

If the client instance is initializd failed, we do not need to uninit it.
This patch adds a state check to check init state of client instance.

Fixes: 38caee9d3ee8 ("net: hns3: Add support of the HNAE3 framework")
Signed-off-by: Fuyun Liang <liangfuyun1@...wei.com>
Signed-off-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.c | 15 ++++++++++++---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h |  1 +
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.c b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
index ab2e72c..21cb0c5 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
@@ -50,13 +50,22 @@ static int hnae3_match_n_instantiate(struct hnae3_client *client,
 	/* now, (un-)instantiate client by calling lower layer */
 	if (is_reg) {
 		ret = ae_dev->ops->init_client_instance(client, ae_dev);
-		if (ret)
+		if (ret) {
 			dev_err(&ae_dev->pdev->dev,
 				"fail to instantiate client\n");
-		return ret;
+			return ret;
+		}
+
+		hnae_set_bit(ae_dev->flag, HNAE3_CLIENT_INITED_B, 1);
+		return 0;
+	}
+
+	if (hnae_get_bit(ae_dev->flag, HNAE3_CLIENT_INITED_B)) {
+		ae_dev->ops->uninit_client_instance(client, ae_dev);
+
+		hnae_set_bit(ae_dev->flag, HNAE3_CLIENT_INITED_B, 0);
 	}
 
-	ae_dev->ops->uninit_client_instance(client, ae_dev);
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
index 804ea83..ffec231 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -52,6 +52,7 @@
 #define HNAE3_DEV_INITED_B			0x0
 #define HNAE3_DEV_SUPPORT_ROCE_B		0x1
 #define HNAE3_DEV_SUPPORT_DCB_B			0x2
+#define HNAE3_CLIENT_INITED_B			0x3
 
 #define HNAE3_DEV_SUPPORT_ROCE_DCB_BITS (BIT(HNAE3_DEV_SUPPORT_DCB_B) |\
 		BIT(HNAE3_DEV_SUPPORT_ROCE_B))
-- 
2.7.4